fix: Stale DATETIME_TIMZONE ref

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: eliasbenb

plexapi/__init__.py

@@ -17,8 +17,7 @@
 PROJECT = 'PlexAPI'
 VERSION = __version__ = const.__version__
 TIMEOUT = CONFIG.get('plexapi.timeout', 30, int)
-DATETIME_TIMEZONE = GLOBAL_DATETIME_TIMEZONE
-setDatetimeTimezone(CONFIG.get('plexapi.timezone', False))  # Sets the DATETIME_TIMEZONE global variable
+DATETIME_TIMEZONE = setDatetimeTimezone(CONFIG.get('plexapi.timezone', False))  # Sets and returns the DATETIME_TIMEZONE global variable
 
 X_PLEX_CONTAINER_SIZE = CONFIG.get('plexapi.container_size', 100, int)
 X_PLEX_ENABLE_FAST_CONNECT = CONFIG.get('plexapi.enable_fast_connect', False, bool)